Category Groups

I’ve just merged a refactor of this component. Functionality should remain the same overall, with some bug fixes.

Behind the scenes this uses some modernized Ember, and eliminates template overrides, which can be a little fragile as far as Discourse customizations go.

This should be fixed now

This is fixed now, the groups will no longer apply to the subcategory layouts

I’ve updated this, so category logos should be much more normally sized now